to confuse someone by using difficult or technical words to describe something

the detailed or complicated facts of something

to prevent something happening smoothly in the way that it was planned, by causing a problem or difficulty.

a sudden success that lasts only a short time and is not likely to be repeated

very advanced in its development

not difficult, easy to implement, easy to understand

someone or something that functions very well or efficiently

If you talk about the nuts and bolts of a subject or an activity, you are referring to the detailed practical aspects of it rather than abstract ideas about it.

full of people or things that are pushed closely together: jam-packed with The streets were jam-packed with tourists.

to misunderstand somebody; to become confused

to waste time doing things that others have already done

to examine something very carefully in order to improve it in the future